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Test Info:

<!DOCTYPE html>
<head>
<title>Performance Paint Timing Test: FCP should not fire with gradient-only backgrounds</title>
<style>
#main {
width: 100px;
height: 100px;
background-image: linear-gradient(to bottom, orange, blue);
}
</style>
</head>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/utils.js"></script>
<div id="main"></div>
<script>
setup({"hide_test_state": true});
promise_test(async t => {
assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported.");
await new Promise(r => window.addEventListener('load', r));
await assertNoFirstContentfulPaint(t);
}, 'Gradients should not count as contentful');
</script>
</body>
</html>